This is a question that's currently being discussed on skeptics.stackexchange. It was thought reasonable to get some input from the audio experts. So with the author's permission I'm posting it here. ...
I've been using minidisc players for the last decade. Since that technology is as good as dead, and so will by my last player soon, I'm in the market for the latest and greatest portable music player ...
If we have an MP3 file and we decode it to an uncompressed WAV file and then later encode it to MP3 again at the same sample rate - why is it that the quality gets degraded? This is a past exam ...